Robert Mann is featured as a contributing expert in Artnet's "Market Snapshot: Ansel Adams," in passages such as the below:

...Adams's estate might not see the hysterical fluctuations of other photographers' markets, but that's not to say his work isn't steadily appreciating. “The values have been steadily increasing over the years as the supply in the secondary market diminishes and the demand for his work increases," said Robert Mann, a key player in Adams's secondary market since the 1970s. “Virtually every institutional art collection and many private collections that include photography begin with Adams," he told Artnet via email, “so it is inevitable that the prints will become more scare and ultimately more valuable."

Click here to read more about the current market for Ansel Adams' work, currently on display at Robert Mann Gallery.